A basic interface device designed for the Raspberry Pi 3, built for students learning realtime development.

• Five pushbuttons and two switches, with hardware debounce
• Four LEDs
• Speaker
• BCD 7-Segment display
• 10-Bit 4-channel SPI ADC
  • Potentiometer and phototransistor attached
• Headers:
  • Power (both 3.3V and 5V)
  • SPI bus with one available chip-select line
  • UART
• Labels:
  • Physical pin numbering
  • RPi3 pin numbering (BCM)
  • Speaker frequency range
  • ADC clock rate range

Designed with Fritzing, manufactured by Aisler (board ordering available here), and all parts sourced from DigiKey (cart export here)*.

Price is roughly $48 each, $62 per three boards, $28 per board for parts.

*Prototype LEDs sourced from Jameco, DigiKey LED quality has not been verified.